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U.S. Naval Academy – Bulkhead Repair

The United States Naval Academy, Bulkhead Repair is the largest contract Hillis-Carnes has recently been involved in. Hillis-Carnes worked in conjunction with our Specialty Construction Group (SCG) to evaluate, develop, and implement a grouting program over two phases (Phase 1 and Phase 2) of work to repair sinkholes that had developed behind the existing bulkhead along Simms Road located at the United States Naval Academy in Annapolis, Maryland. Hillis-Carnes provided subsurface exploration (Standard Penetration Test (SPT) Borings and Cone Penetrometer Testing (CPT)), geophysical surveys (Micro-Gravity and Seismic Refraction), laboratory testing, and engineering services that evaluated the subsurface conditions for approximately 2,000 linear feet behind the bulkhead.

Hillis-Carnes performed several types of geotechnical exploration and testing necessary to ensure that a thorough knowledge of the subsurface conditions has been attained. From the data gathered during the exploration and testing work, Hillis-Carnes developed a program to stabilize the soil behind the affected bulkheads and in and around the deadmen. The goal of the project was to 1) prevent migration of soil particles through or under the bulkheads, 2) prevent surface subsidence along the road and behind the bulkhead, 3) improve the density of the soils between the bulkhead and the deadmen, and 4) prepare a stable subgrade for the reconstruction of the asphalt pavements.